ND Brand Compatible Pre-filled Brother LC101 LC103 LC105 LC107 Refillable Ink Cartridges with Auto Reset Chips and 4 X 30ml Dye Ink Refill Kit for BROTHER MFC J470DW, J475dw, J4310DW, J4410DW, J4510DW, J4610DW, J4710DW Printers The cartridge can be easily refilled and reused again and again. There is easy-refill hole and rubber plug on the top of each cartridge. It is enviromental friendly green inkjet product - Save our earth with a much less cost. The cartridges are transparent. It is easy to view how much ink left.